How to descale and maintain Gaggia Classic Espresso Machine

How to descale and maintain Gaggia Classic Espresso Machine
How to descale and maintain Gaggia Classic Espresso Machine
How to descale and maintain Gaggia Classic
Espresso Machine
How to tear down the Gaggia Classic Espresso machine to fix problems with scale and worn
gaskets.
Written By: Kate Morris
INTRODUCTION
Espresso machines need to be descaled regularly to remove mineral buildup. After I had owned the
Gaggia for 2 years, with regular (every 6 weeks) descaling, the machine was struggling to pump
enough water to make a decent cup of espresso. Sydney does not have a much mineralization in the
water, but there were was significant buildup. Here I document how I fixed the problem by pulling the
machine apart, cleaning it and replacing the rubber gaskets.
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How to descale and maintain Gaggia Classic Espresso Machine
Step 1 — How to descale and maintain Gaggia Classic Espresso Machine

Here are the tools you need (from
left):

1 flathead screwdriver

2 allen keys / allen wrenches, one
small, one larger

13mm thin spanner / wrench

2 #1 Philips head screw drivers
(one short, one long).

One adjustable spanner / wrench
Step 2
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
First, unplug the espresso machine's
power cord.

The top of the machine is removed
by removing two Phillips head
screws (see the red arrows for the
location).

Be careful - there is a ground wire
running to the coffee cup warmer.
Page 2 of 8
How to descale and maintain Gaggia Classic Espresso Machine
Step 3

The next step is to carefully remove
the ground wire from the cup
warmer. Pull the metal clip, not the
plastic wire cover.

You can now remove the top of the
machine.

The next steps are to disconnect the
electrical connections (the wiring
harness).

Start with the connections at the rear
of the machine. The earth wire
(yellow/green) is on the left.

Use a marker to label the two power
wires - it will make it easier to
reassemble later. Be sure to pull on
the plastic clip rather than the cable.
Step 4
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Page 3 of 8
How to descale and maintain Gaggia Classic Espresso Machine
Step 5

To remove the cables from the front
switch, it's easier to start by pushing
the switch through the front of the
machine.

Push on the clips on either side of
the switch block and gently push it
through.

Make sure you label each connector.
It's possible to use the wiring
diagram if you forget, but much
easier if use labels.
Step 6
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How to descale and maintain Gaggia Classic Espresso Machine
Step 7

There's an earth wire attached to the
top of the pump that should be
removed as well, marked with a red
box in the picture.

You DO NOT need to remove the
heating unit connectors (two of them
are marked with yellow boxes in the
picture).

It's a good idea to remove the
shower screen now if you have not
already done so. It's held on by a
single Philips head screw as shown.

If you have some descaler solution
handy, leave the screw and the
shower screen soaking in it while
you work.
Step 8
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Page 5 of 8
How to descale and maintain Gaggia Classic Espresso Machine
Step 9

Remove the pump assembly by releasing the two Philips head screws on either side of the pump.
Move the pump to the right, out of the way, for the next step.

(TODO: photo)
Step 10

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Now we disconnect the tubing that
leads to the overflow pipe. Locate
the external overflow pipe connector.
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How to descale and maintain Gaggia Classic Espresso Machine
Step 11

Use a 13mm spanner / wrench to
hold the inside part still while you
loosen the external connector.

This step is much easier if you move
the pump out of the way first (see
step 9).

Remove the milk frothing attachment
by unscrewing the bolt that holds it
in place.
Step 12

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Gently pull the attachment away
from the machine.
Page 7 of 8
How to descale and maintain Gaggia Classic Espresso Machine
Step 13

Remove the four bolts holding the
boiler assembly into the case of the
machine. You'll need the smaller of
the allen keys / wrenches for this.
(the diagram only shows three of the
bolts, the fourth is obscured).
Step 14

Gently lift the pump and the boiler assembly out of the base of the machine. If anything is stuck,
check the previous steps to make sure you didn't miss anything.

There may be some fluid draining from the boiler at this point, so make sure you are prepared for it!
To reassemble your device, follow these instructions in reverse order.
This document was last generated on 2017-04-20 03:33:04 PM.
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